Improvement in cramps for hollow walls



R. HINyEST. -Cramps for Hollow-Walls.

Patented April 20,1875.

k\\\\\\% mmw Wiine ssg s.

Inventorja/wz $2 THE GRAPHIC C0.PHOTO.-LITH-39&4I PARK PLACELN-Y.

'J'NITED STATES PATENT OEEIoE.

ROBERT HINVEST, OF NEW YORK, N. Y.

IMPROVEMENT IN CRAMPS FOR HOLLOW WALLS.

Specification forming part of Letters Patent No. 162,383, dated April20, 1875; application filed October 7, 1874.

To all whom it may concern:

Be it known that I, ROBERT HINVEST, of the city, county, and State ofNew York, have invented a certain new and useful Improvement in Crampsfor Hollow WValls, 850., of which the following is a specification Thisinvention consists in combining, with a cramp which connects the twoadjoining sections of a hollow wall or other object, longitudinalstay-bars, which are secured in the sections and provided with lugs,which are fitted in openings in the cramp in such aman ner as to hold itin position, and hold the sections together; also, in dovetailing theends of the cramp, whereby it is more firmly held in place.

The invention is illustrated in the accompanying drawing, in which-Figure l is a horizontal section, showing it applied to a hollow wall.Fig. 2 is a longitudinal vertical section. Fig. 3 is a transversesection.

Similar letters indicate corresponding parts.

The letter A designates the two adjoining parts or sections of a hollowwall, built in this example of brick-work, in which sections areembedded the longitudinal stay-bars B, as shown. The stay-bars B areprovided with lugs O, which are formed or secured thereon in anysuitable manner, the lugs being fitted in holes or openings in thecramp, and serving to connect the stay-bars and cramps together. Ddesignates the cramp, the ends of which are dovetailed, so that it ismore rigidly held in position, and that the sections A are more firmlyconnected together. In applying my cramp to Walls, I put the stay-bars Blongitudinally in place, and in its proper position put the cramp D, soas to receive the lugs O in the openings, when I proceed to build thewall, and so on with successive cramps. My invention is adapted forconnecting timber and other objects besides hollow walls, and I do notwish to restrict myself to walls.

What I claim as new, and desire to secure by Letters Patent, is-

A cramp for walls, constructed with openings or recesses to receive thelugs O of the staybars B, combined for operation and adaptationsubstantially as described.

In testimony that I claim the foregoing I have hereunto set m y handthis 2d day of October, 1874.

Witnesses:

W. HAUFF, GHAs. WAHLERS.

ROBERT HINVEST.

